Cobalt oxide modified porous carbon anode enhancing electrochemical performance for Li-ion batteries

被引:30
作者
Han, Yan [1 ]
Dong, Lei [1 ]
Feng, Jianmin [1 ]
Li, Dejun [1 ]
Li, Xifei [1 ]
Liu, Shuangxi [2 ]
机构
[1] Tianjin Normal Univ, Coll Phys & Mat Sci, Energy & Mat Engn Ctr, Tianjin 300387, Peoples R China
[2] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China
关键词
Porous carbon; Co3O4; nanoparticles; Electrochemical performance; Li-ion batteries; CO3O4; NANOPARTICLES; NANOWIRE ARRAY; COMPOSITE; CAPACITY; ELECTRODES; PRECURSOR;
D O I
10.1016/j.electacta.2015.03.197
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A cobalt oxide modified porous carbon has been synthesized via a solvothermal method followed by a simple thermal treatment process. Scanning electron microscopy and transmission electron microscopy images reveal that Co3O4 nanoparticles (NPs) with sizes of 20-40 nm are uniformly anchored onto porous carbon (PC). As an anode material for Li-ion batteries (LIBs), the composite exhibits enhanced reversible capacity, excellent cyclic performance, high Coulombic efficiency and good rate capability, which could be attributed to the 3D hierarchical porous structure of PC as well as the small size of the Co3O4 NPs providing convenient and accessible routs for electrolyte diffusion and intercalation of Li ions. Moreover, the interconnective networks of PC could decrease the inner resistance of LIBs and maintain structural stability. Thus the Co3O4/PC composite could be a promising anode material for high-performance LIBs. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:246 / 253
页数:8
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